Thumbnails generation with phpThumb - phpThumb is a great thumbnail generator, it can generate thumbs with GD, GD2 or ImageMagick. There are many features like crop, rotate, watermark,... see all the features on the phpThumb homepage.

HABTM Add & Delete Behavior - Many people gripe about the HABTM associations in CakePHP and how difficult it is to add or delete a single record. This behavior takes care of the task for you!